Physiological energetics of juvenile clams Ruditapes decussatus in a high CO2 coastal ocean

Marine Ecology Progress Series

Uxio Labarta¹  Xos#xe9 Ant#xf3n #xc1lvarez-Salgado¹  M#xaa Jos#xe9 Fern#xe1ndez-Reiriz¹  Pedro Range¹ 

关键词: Ocean acidification;    Sea water pH;    Physiological energetics;    Clams;    Ruditapes decussatus;   

DOI  :  10.3354/meps09062

学科分类：海洋学与技术

来源: Inter-Research

【 摘 要 】

ABSTRACT: Effects of coastal ocean acidification, other than calcification, were tested on juvenile clams Ruditapes decussatus during a controlled CO₂ perturbation experiment. The carbonate chemistry of natural (control) seawater was manipulated by injecting CO₂ to attain 2 reduced pH levels (–0.4 and –0.7 pH units) as compared with the control seawater. After 87 d of exposure, we found that the acidification conditions tested in this experiment significantly reduced the clearance, ingestion and respiration rates, and increased the ammonia excretion rate of R. decussatus seeds. Reduced ingestion combined with increased excretion is generally associated with a reduced energy input, which will likely contribute to a slower growth of the clams in a future high CO₂ coastal ocean. These results emphasize the need for management policies to mitigate the adverse effects of global change on aquaculture, which is an economically relevant activity in most coastal areas worldwide.

【 授权许可】

Unknown